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Which expression is equivalent to 2x^2+7x+4?

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?